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Developing GNOME Apps in JavascriptFelipe Borges
Why talk about Gjs?
GNOME is....
Desktop environment Development platform
GNOME Developer Platform
Javascript is pretty cool!
It has bad parts! Globals Unexpected behaviour No block scope
But it also has good parts! Closures are central Functions are first-class objects Prototypal inheritance Is everywhere!
Gjs First released in 2008 Well maintained Main development language for
writing GNOME Apps
GNOME Apps in JS
Documents Shell Polari
gjs-console
Get started
Gjs and Gtk Actions and signals Run your application
const Lang = imports.lang;const Gtk = imports.gi.Gtk;
const App = new Lang.Class({ Name: 'App', Extends: Gtk.Application, _init: function () { this.parent({ application_id: 'org.example.App' }); this.connect('activate', Lang.bind(this, this._onActivate)); this.connect('startup', Lang.bind(this, this._onStartup)); },
_onActivate: function () { this._window.show_all(); }, _onStartup: function () { this._window = new Gtk.ApplicationWindow({ application: this, title: "Hello World!" });
this._window.set_default_size(200, 200); let label = new Gtk.Label({ label: "Hello World" }); this._window.add(label); }});
Run your application
let app = new App();app.run(ARGV);
$ gjs helloWorld.js
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Developing GNOME Apps in JavascriptFelipe Borges